Astronomy and Cosmology

3705 topics in this forum

1. How does limb Darkening affect the radius calculated?

   By physica, January 6, 2015
   • 3 replies
   • 2.5k views
   • 
   • imatfaal
   • January 7, 2015

2. Feedback desired on an expansion respresentation

   By Endy0816, January 5, 2015
   • 4 replies
   • 1.1k views
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   • Endy0816
   • January 5, 2015

3. Energy Equations !

   By Commander, January 2, 2015
   • 16 replies
   • 2k views
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   • Strange
   • January 2, 2015

4. why most of space videos & images are CGI?

   By Ganesh Ujwal, December 30, 2014
   • 14 replies
   • 4.3k views
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   • MigL
   • January 2, 2015

5. formula for relationship between mass and time?

   By godofgamblers, December 30, 2014
   • 2 replies
   • 972 views
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   • godofgamblers
   • January 1, 2015

6. some questions from non-science guy

   By godofgamblers, December 24, 2014
   • 19 replies
   • 2k views
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   • godofgamblers
   • December 29, 2014

7. looking at the solar system

   By michel123456, March 2, 2013
   • 11 replies
   • 3.2k views
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   • StringJunky
   • December 28, 2014

8. How is the Horizon Problem really a problem?

   By Ganesh Ujwal, December 23, 2014
   • 5 replies
   • 1.9k views
   • 
   • Mordred
   • December 28, 2014

9. Why is the day sky blue?

   By dstebbins, December 21, 2014
   • 8 replies
   • 1.9k views
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   • Eise
   • December 23, 2014

10. Cosmic rays and neutrinos

    By Ganesh Ujwal, December 22, 2014
    • 3 replies
    • 1k views
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    • Mordred
    • December 22, 2014

11. Two Halves that don't make a whole

    By LaurieAG, December 18, 2014
    • 3 replies
    • 1.5k views
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    • LaurieAG
    • December 22, 2014

12. Suppose that I am looking in my telescope to a distant star 1 2 3 4 6

    By michel123456, November 22, 2014
    • 140 replies
    • 13.8k views
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    • Ophiolite
    • December 20, 2014

13. Basic Holographic Principle question

    By incompetence, December 18, 2014
    • 3 replies
    • 1.1k views
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    • Endy0816
    • December 20, 2014

14. The CMB, how is that possible? 1 2

    By michel123456, November 1, 2014
    • 45 replies
    • 5.8k views
    • 
    • imatfaal
    • December 17, 2014

15. Multiverses, wow that's big!

    By mpmcd101, November 30, 2014
    • 1 reply
    • 1k views
    • 
    • hypervalent_iodine
    • November 30, 2014

16. What direction is the big bang? (split from telescope looking at a distant star)

    By nullus, November 23, 2014
    • 12 replies
    • 1.8k views
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    • swansont
    • November 27, 2014

17. Astrophotography Contest

    By Eve, November 26, 2014
    • 0 replies
    • 986 views
    • 
    • Eve
    • November 26, 2014

18. Evaporation of a black hole

    By afm, November 14, 2014
    • 2 replies
    • 1.2k views
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    • MigL
    • November 14, 2014

19. Comet/Meteor Impact with Earth - split from Rosetta

    By kristalris, November 14, 2014
    • 5 replies
    • 1.4k views
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    • Ophiolite
    • November 14, 2014

20. New telescope array captures planet-forming disk

    By sunshaker, November 12, 2014
    • 6 replies
    • 1.5k views
    • 
    • Robittybob1
    • November 12, 2014

21. Do You Think Dark Matter and Dark Energy Is Related?

    By Future JPL Space Engineer, October 30, 2014
    • 10 replies
    • 1.7k views
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    • michel123456
    • November 3, 2014

22. Does the Dark Matter Increasing?

    By Future JPL Space Engineer, October 28, 2014
    • 5 replies
    • 1.8k views
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    • Mordred
    • October 29, 2014

23. Beginning/End of the World - Discussion 1 2

    By Artander, October 1, 2014
    • 47 replies
    • 4.9k views
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    • AthenasChosenOne
    • October 28, 2014

24. Evidence of past CMB (split from steady state universe)

    By michel123456, October 26, 2014
    • 17 replies
    • 2.1k views
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    • MigL
    • October 28, 2014

25. A Steady State Universe

    By Carrock, October 24, 2014
    • 17 replies
    • 3.3k views
    • 
    • Mordred
    • October 26, 2014